CHICAGO — Joe Maddon showed up in a blue Chicago Cubs “We Came To Reign” sweater. Today, he might as well try chaps and spurs.

That’s because Maddon will probably feel like he is in the Wild West when the Cubs open their NL Division Series against the San Francisco Giants, managing against Bruce Bochy.

“He’s a cowboy,” Maddon said Thursday. “He’ll do anything. And when you manage against a cowboy, it’s always interesting.”

It sure figures to be that way with two successful managers with different approaches going at it. Maddon and Bochy tend to treat regular-season matchups as if they were playoff games. Now that they are actually meeting in the postseason?

“Oh, they’re going to have a field day,” Cubs outfielder Chris Coghlan said. “They’re going to love it. They do every time.”

There’s Maddon, the laid-back professorial hipster with the white hair and horned rim glasses, who balances advanced metrics with more traditional analysis and keeps his players on their toes simply by being different and fun.

He also has a team that comes in with a major league-leading 103 wins and the hopes of its long-suffering fans that the team’s first World Series title since 1908 is on the way.

Then there’s the more old-school Bochy, who while not quite as immersed in the numbers has led the Giants to three World Series titles since 2010.

“We look forward to managing against guys that we know do such a great job and will be so well prepared,” Bochy said.